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Eight influences of led lamp beads on led display
by：Demo
2021-07-04
Many customers understand that LED lamp beads (also called LED chips) are very important core components of LED display screens, which play a vital role in performance, but in fact, most people just know this concept, so LED lights What are the specific effects of beads on the led display? There are not many that can really be distinguished, so here is a detailed introduction to the eight major effects of LED lamp beads on the LED display.
1. Angle of view influence
The viewing angle of the LED display is determined by the viewing angle of the LED lamp beads. At present, most outdoor displays use elliptical LEDs with a horizontal viewing angle of 100° and a vertical viewing angle of 50°, while indoor displays use SMD LEDs with a horizontal and vertical viewing angle of 120°. The display screen on the highway generally uses 30° because of its particularity; a round LED with a viewing angle is sufficient. Some high-rise display screens have higher requirements for vertical viewing angles. Viewing angle and brightness are contradictory to each other, and a large viewing angle will inevitably reduce brightness. The choice of perspective needs to be determined according to the specific purpose.
2. Brightness influence
LED brightness is an important determinant of display brightness. The higher the brightness of the LED, the greater the margin for the use of current, which is good for saving power and keeping the LED stable. LEDs have different angle values. When the brightness of the chip is fixed, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display. Generally, a 100-degree LED should be selected to ensure sufficient viewing angle of the display screen. For displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle, and price.
3. Comparison of failure rate
Since the full-color display screen is composed of tens of thousands or even hundreds of thousands of pixels composed of red, green and blue LEDs, the failure of any color LED will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate between the start of assembly of the LED display and the 72-hour aging before shipment should be no more than three ten thousandths (referring to the failure caused by the LED lamp beads itself).
4. LED lamp beads have a direct impact on the life of the led display
The theoretical life of the LED device is 100,000 hours, which is much longer than the working life of other parts of the LED display. Therefore, as long as the quality of the LED device is guaranteed, the working current is appropriate, the PCB heat dissipation design is reasonable, and the display screen production process is rigorous, the LED device will be One of the most durable parts in the entire display screen.
LED devices account for 70% of the price of LED displays, so LED devices can determine the quality of LED displays. my country is not only a major producer of LED devices, but also a gathering place for LED display manufacturing. The high-tech requirements of LED displays are the future development trend. The high-quality requirements of LED displays are not only about the trend of LED display manufacturers, but also the development of LED display device manufacturers. From the control of LED devices, China will promote China's transformation from a large LED display manufacturing country to an LED display manufacturing powerhouse.
5. Antistatic ability
LED is a semiconductor device, which is sensitive to static electricity and can easily cause static failure. Therefore, the anti-static ability is very important to the life of the display screen. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED should not be lower than 2000V.
6. Attenuation characteristics
LED display screens will appear brightness decline and display color inconsistency after a long time working, mainly due to the brightness decay of LED devices. The attenuation of LED brightness will reduce the brightness of the entire screen. The inconsistency of the brightness attenuation of the red, green, and blue LEDs will cause the color of the LED display to be inconsistent, which is what we often say the display is spent. High-quality LED devices can well control the brightness attenuation range. According to the standard of 20mA lighting at room temperature for 1000 hours, red attenuation should be less than 2%, blue and green attenuation should be less than 10%, so blue and green LEDs should not use 20mA current when designing the display, preferably only 70% to 80 % Of rated current.
In addition to the attenuation characteristics related to the characteristics of the red, green, and blue LEDs, the current, the heat dissipation design of the PCB board, and the ambient temperature of the display screen all affect the attenuation.
7. The influence of size
The size of the LED device affects the pixel point distance of the LED display screen, that is, the resolution. 5mm oval lights are mainly used for outdoor displays above P16, 3mm oval lights are mainly used for outdoor displays of P12.5, P12, P10, and 3528 SMD LEDs are mainly used for indoor displays of P6 and P8. 2020/2121 SMD LEDs are mainly used for indoor displays such as P2 and P3. Under the premise that the dot pitch is constant, the size of the LED device increases, which can increase the display area and reduce the graininess, but because the black area is reduced, the contrast will be reduced; on the contrary, the LED size is reduced, the display area is reduced, and the graininess is increased. , The black area is enlarged, increasing the contrast.
8. Whole screen consistency
The full-color display is composed of countless red, green, and blue LEDs. The brightness and wavelength consistency of each color LED determines the brightness uniformity, white balance uniformity, and white balance of the entire display screen. Chromaticity consistency. Generally speaking, display screen manufacturers require device suppliers to provide LEDs with a wavelength range of 5nm and a brightness range of 1:1.3. These indicators can be achieved by the device supplier through the classification of the LED Light module-separation machine. The consistency of voltage is generally not required.
Demo Photoelectric Technology (Wuxi) Co., Ltd. has various branches in local businesses, servicing customers and helping to pull in traffic to those businesses.
The best way to confront your led light engine module problem is to search for a high quality offered by Demo Photoelectric Technology (Wuxi) Co., Ltd. at Demo Led Module. Take a look!
Demo Photoelectric Technology (Wuxi) Co., Ltd. can promise you that we never conceded on the quality standards of our products.
Equipping About Us with innovative technology and updated processes will simplify daily compliance duties so that they can focus on attracting, retaining, and developing the most engaged workforce possible.
Like anything else in led pcb board, there are a variety of choices and types to choose from, and each of them will affect your budget in some form. Demo Photoelectric Technology (Wuxi) Co., Ltd. offers a range of quality at competitive prices.
1. Angle of view influence
The viewing angle of the LED display is determined by the viewing angle of the LED lamp beads. At present, most outdoor displays use elliptical LEDs with a horizontal viewing angle of 100° and a vertical viewing angle of 50°, while indoor displays use SMD LEDs with a horizontal and vertical viewing angle of 120°. The display screen on the highway generally uses 30° because of its particularity; a round LED with a viewing angle is sufficient. Some high-rise display screens have higher requirements for vertical viewing angles. Viewing angle and brightness are contradictory to each other, and a large viewing angle will inevitably reduce brightness. The choice of perspective needs to be determined according to the specific purpose.
2. Brightness influence
LED brightness is an important determinant of display brightness. The higher the brightness of the LED, the greater the margin for the use of current, which is good for saving power and keeping the LED stable. LEDs have different angle values. When the brightness of the chip is fixed, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display. Generally, a 100-degree LED should be selected to ensure sufficient viewing angle of the display screen. For displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle, and price.
3. Comparison of failure rate
Since the full-color display screen is composed of tens of thousands or even hundreds of thousands of pixels composed of red, green and blue LEDs, the failure of any color LED will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate between the start of assembly of the LED display and the 72-hour aging before shipment should be no more than three ten thousandths (referring to the failure caused by the LED lamp beads itself).
4. LED lamp beads have a direct impact on the life of the led display
The theoretical life of the LED device is 100,000 hours, which is much longer than the working life of other parts of the LED display. Therefore, as long as the quality of the LED device is guaranteed, the working current is appropriate, the PCB heat dissipation design is reasonable, and the display screen production process is rigorous, the LED device will be One of the most durable parts in the entire display screen.
LED devices account for 70% of the price of LED displays, so LED devices can determine the quality of LED displays. my country is not only a major producer of LED devices, but also a gathering place for LED display manufacturing. The high-tech requirements of LED displays are the future development trend. The high-quality requirements of LED displays are not only about the trend of LED display manufacturers, but also the development of LED display device manufacturers. From the control of LED devices, China will promote China's transformation from a large LED display manufacturing country to an LED display manufacturing powerhouse.
5. Antistatic ability
LED is a semiconductor device, which is sensitive to static electricity and can easily cause static failure. Therefore, the anti-static ability is very important to the life of the display screen. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED should not be lower than 2000V.
6. Attenuation characteristics
LED display screens will appear brightness decline and display color inconsistency after a long time working, mainly due to the brightness decay of LED devices. The attenuation of LED brightness will reduce the brightness of the entire screen. The inconsistency of the brightness attenuation of the red, green, and blue LEDs will cause the color of the LED display to be inconsistent, which is what we often say the display is spent. High-quality LED devices can well control the brightness attenuation range. According to the standard of 20mA lighting at room temperature for 1000 hours, red attenuation should be less than 2%, blue and green attenuation should be less than 10%, so blue and green LEDs should not use 20mA current when designing the display, preferably only 70% to 80 % Of rated current.
In addition to the attenuation characteristics related to the characteristics of the red, green, and blue LEDs, the current, the heat dissipation design of the PCB board, and the ambient temperature of the display screen all affect the attenuation.
7. The influence of size
The size of the LED device affects the pixel point distance of the LED display screen, that is, the resolution. 5mm oval lights are mainly used for outdoor displays above P16, 3mm oval lights are mainly used for outdoor displays of P12.5, P12, P10, and 3528 SMD LEDs are mainly used for indoor displays of P6 and P8. 2020/2121 SMD LEDs are mainly used for indoor displays such as P2 and P3. Under the premise that the dot pitch is constant, the size of the LED device increases, which can increase the display area and reduce the graininess, but because the black area is reduced, the contrast will be reduced; on the contrary, the LED size is reduced, the display area is reduced, and the graininess is increased. , The black area is enlarged, increasing the contrast.
8. Whole screen consistency
The full-color display is composed of countless red, green, and blue LEDs. The brightness and wavelength consistency of each color LED determines the brightness uniformity, white balance uniformity, and white balance of the entire display screen. Chromaticity consistency. Generally speaking, display screen manufacturers require device suppliers to provide LEDs with a wavelength range of 5nm and a brightness range of 1:1.3. These indicators can be achieved by the device supplier through the classification of the LED Light module-separation machine. The consistency of voltage is generally not required.
Demo Photoelectric Technology (Wuxi) Co., Ltd. has various branches in local businesses, servicing customers and helping to pull in traffic to those businesses.
The best way to confront your led light engine module problem is to search for a high quality offered by Demo Photoelectric Technology (Wuxi) Co., Ltd. at Demo Led Module. Take a look!
Demo Photoelectric Technology (Wuxi) Co., Ltd. can promise you that we never conceded on the quality standards of our products.
Equipping About Us with innovative technology and updated processes will simplify daily compliance duties so that they can focus on attracting, retaining, and developing the most engaged workforce possible.
Like anything else in led pcb board, there are a variety of choices and types to choose from, and each of them will affect your budget in some form. Demo Photoelectric Technology (Wuxi) Co., Ltd. offers a range of quality at competitive prices.
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